On Wednesday, 27 November 2019 at 18:25:47 UTC, H. S. Teoh wrote:
On Wed, Nov 27, 2019 at 02:35:53PM +0000, Ernesto Castellotti
via Digitalmars-d-announce wrote:
Hi,
I wrote a page in the wiki for basic information on how to use
D on AVR 8-bit, using LLVM and LDC.
https://wiki.dlang.org/D_on_AVR
With BetterC everything seems to be working fine, now it's
time to create a framework for using D on microcontrollers!
According to Walter (cf.
https://digitalmars.com/articles/hits.pdf, slide 5), D was
designed with the assumption of running on a 32-bit or higher
CPU. How is this handled in the AVR case? Or is this strictly
only for betterC? (Even with -betterC I'm having some trouble
imagining how basic D features might work on an 8-bit
controller.)
Not questioning your work -- I think this is awesome -- but
just curious about the practical implications of writing D for
an 8-bit environment.
T
The support to targets that use 16 bits as a pointer size has
already been added to LDC
(https://github.com/ldc-developers/ldc/pull/2194), so minimal AVR
support is present (AVR uses 16 bit pointers).
Obviously not all the language works with AVR, however with
BetterC there are no problems.
But the support to druntime and phobos is non-existent, honestly
I don't think it's a big problem, I am of the opinion that it is
better to have a separate library to develop on AVR.
Most of the modules in phobos are useless for the classic AVR
work, or they are inadequate because they use GC or depend on an
operating system.
In my opinion, nobody really wants to use them.
